Wavelength Electronics PLD K-CH Series, Datasheet And Operating Manual

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PLDXK-CH SERIES LASER DIODE DRIVER
PIN DESCRIPTIONS
Table 1. Pin Descriptions
PIN NAME
CABLE
COLOR
PIN DESCRIPTION
Connector H1; Screw terminal header; WCB308 Power/LD Cable available separately
1 GND Black Power Supply Ground. High current return for the +5 V power supply input.
2 +5 V Red
Supply voltage to control electronics. Also used to power the laser diode on the
PLD5K-CH and PLD10K-CH. This pin is tied to Pin H1:3 by factory-installed
external jumper on the PLD5K-CH and PLD10K-CH; cut the jumper when operating
high-compliance lasers. The PLD12.5K-CH is delivered from the factory with the
jumper already removed; two independent power supplies are required to operate the
PLD12.5K-CH. See Figure 6 on page 9 .
3 LDA White
Laser Diode Anode. This pin is tied to Pin H1:2 by factory-installed external jumper on
the PLD5K-CH and PLD10K-CH; cut the jumper when operating high-compliance lasers.
The PLD12.5K-CH is delivered from the factory with the jumper already removed; two
independent power supplies are required to operate the PLD12.5K-CH. See Figure 6 on
page 9
.
4 LDC Blue Laser Diode Cathode.
Connector J1, WCB307 Photodiode Cable (included)
1 PDA Red
Photodiode Anode for Type A and Type B lasers.
See Figure 7 and Figure 10 for operation with Type C laser diode packages.
2 PDC Black
Photodiode Cathode connection for Type C lasers ONLY.
See Figure 7 and Figure 10 .
Connector J2, WCB304 Monitor Cable (included)
1 COMMON Black
Measurement ground. Low current return only with monitor pins and ANALOG IN.
Internally shorted to GND (pin H1:1).
2 LMON White
Current Limit Setpoint Monitor. Transfer function varies by model—refer to Table 2 .
Range 0 to 2.5 V. Impedance 1 kΩ. NOTE: Current limit needs to be set 0.2 V above
desired level; see page 15 for instructions on fine-tuning the current limit.
3 PMON Red
Power Monitor (PD Current Monitor). Transfer function varies by PD feedback range
setting—refer to Table 2 . Range 0 to 2.5 V. Impedance 1 kΩ.
4 IMON Green
Laser Diode Output Current Monitor. Transfer function varies by model—refer to Table 2 .
Range 0 to 2.5 V. Impedance 1 kΩ.
Connector J3, WCB305 Input/Output Cable (included)
1 COMMON Black
Measurement ground. Low current return only with monitor pins and ANALOG IN.
Internally shorted to GND (pin H1:1).
2 PD OUT Orange
Photodiode Output. For Type C laser diode packages only.
See Figure 7 and Figure 10 .
3 LD STATUS WHite
Status output pin. Indicates if the driver has reached current limit and has switched off
the output. Signal is < 0.3 V if the driver is in limit and output is latched off. Signal is
high impedance during normal operation. Toggle LD Enable to reset the limit circuit and
enable the output current.
4 LD ENABLE Red
Output Enable. Disable = ground or floating. Enable = 3 to 5 V.
Requires 5 mA input current. Not TTL-compatible.
5 ANALOG IN Green
Remote setpoint or modulation input. Transfer function varies by model and operating
mode—refer to Table 2 . Range 0 to 5 V. Impedance 1 MΩ.
Not TTL-compatible. Connect ANALOG IN pin to Common (pin J3:1) when not using the
analog input function. The ANALOG IN signal sums with the onboard setpoint value. See
Electrical Specifications for damage threshold information.
6 PDV Blue
Photodiode Voltage. For Type C laser diode packages only.
See Figure 7 and Figure 10 .
NOTE: Revision A of the PLD5K-CH and PLD10K-CH use a different connector configuration. See
Figure 17 on page 16
.